We all need to exercise. Doctors say it is good for us. It makes our body strong. And we will feel better about ourselves. We can exercise twice a week. Twenty minutes each time is enough(足够的). There are many ways(方法)to exercise. We can walk, run, play sports or swim. Many people go to special(特别的)places to exercise. These places have a lot of equipment(设备). They exercise with their friends together. Some people have equipment in their homes. Exercising can be fun. How do you exercise?

A. Twice a day.

B. I think you need about an hour of exercise a day, Linda!

C. How often do you exercise, Linda?

D. How many minutes do you exercise?

E. About ten minutes.

F. Okay. I'm going to exercise an hour a day.

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